ML20030C377
| ML20030C377 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/21/1981 |
| From: | Hovey G METROPOLITAN EDISON CO. |
| To: | Barrett L Office of Nuclear Reactor Regulation |
| References | |
| LL2-81-0204, LL2-81-204, NUDOCS 8108260042 | |
| Download: ML20030C377 (3) | |
Text
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Metrouc, titan Edison Company
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Post Office Box 480 Middletown, Pennsylvania 17057 Writer's Direct Dial Number
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August 21, 1981 M
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LL2-81-0204 G
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D TMI Program Office 5!"
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Attn:
Mr. L. 11. Barrett 3 Deputy Program Director U. S. Nuclear Regulatory Commission 0
c/o Three Mile Island Nuclear Station Middletown, Pennsylvania 17037
Dear Sir:
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' I SD Three Mile Island Nuclear Station, Unit 2 (TMI-2) /
R g[E Operating License No. DPR-73
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Thepurposeofthisletteristoinformyouoftheresinmixture'w'ek intend to use for processing Reactor Building Sump Water and our 9,
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reasons for choosing it.
g The Technical Advisory Group (TAG) has recommended a 3/2 LINDE IE-96/
LINDE A-51 ratio as the optimum resin mix for use in the Submerged Demineralizer System for sump water processing. This recommendation is based on the results of the tracer level test and the hot cell work with TMI-2 sump water.
The 3/2 mixture minimizes the cesium and strontium breakthrough out of the first and second liners so that the curie deposition on the third and fourth liners is as low as possible. This mixture also assures the highest quality effluent from the SDS system.
Breakthrough curves for cesium and scontium from the first vessel are attached.
These curves are for the first cycle of operation.
Savannah River is currently running their computer modelof the SDS system to generate data on cumulative and instantaneous breakthrough from all four columns for the seven cycles of vessel movement. As actual performance generates additional data, the model will be improved and updated to reflect the most current information. bocak-through curves for the second liner are not being provided at this time because cesium and stra *.ium breakthrough will be less than one percent from the second colu-during the first cycle of proc.essing.
5 We are still undecided on the issue of vessel rotation. While the TAG
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fully understands the operational advantages of minimizing liner move-8108260042 810821 PDR ADOCK 05000320 P
PDR Metropolitan Edson Company is a Member of the General Public Utilities System i
Mr. L.11. Barrett LL2-81-0204 ments, they prefer to delay this decision until after we have actual processing experience.
Sincerely,
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/K /#V G. K. Ilovey Vice-President and Director, TMI-2 OKil:JJB:dj'o
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Attachment cc:
Dr. B. J. Snyder, Program Director, TMI Program Director 4
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